SU1239688A1 - Method and apparatus for diagnostic checking of failures of elements of feedback circuit of technical objects - Google Patents

Abstract

The invention relates to the field of technical diagnostics and can be used in control systems of complex technical objects to search for a fault location among the elements covered by the feedback circuit. The purpose of the invention is to increase the reliability and speed of devices that diagnose the feedback loop of technical objects without changing the structure when the fault is localized, which is achieved by fixing the first monitored parameter beyond the tolerance and locking the subsequent failure states of the functional elements caused by the response to the true failure. The device detects tolerance control sensors according to the number of outputs of functional elements of the object, whose parameters are controlled, logical keys, made in the form of NOT elements and AND elements, OR element, fault indicators, NO element, and an indicator of good condition. 2 sec. pfl, 1 il.s S (L CA5 SO about: oo 00

Description

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1239688

The invention relates to technical diagnostics and can be used with 3 systems for monitoring complex technical objects of dp1; at the fault location among the elements covered by a feedback circuit.

The purpose of the invention is to increase the reliability and speed of the device for diagnosing the feedback loop of technical objects without changing the structure of technical objects when the fault is localized.

The drawing shows the functional diagram of the device.

The device that implements the method for diagnosing failures of the feedback loop elements contains functional elements, sensors of the pre-start control 7, logical keys 8, RS-flip-flops 9, fault indicators 10, element 1I OR, element 12 NOT, indicator 13 in good condition element NOT 14, the logical element And 15, the object 16 control.

The device works as follows.

In the initial state 5, when the parameters of the functional elements 1-6 of the object 16 are in the tolerance field, there are no signals at the outputs of the sensors 7, all logical keys 8 are open, and the RS-flip-flops 9 are reset to the initial state by the S-input signal. In this case, the indicators 10 are turned off, and the indicator 13 is on.

If one or more functional elements of object 16, for example I and 6, fail, the output of sensors 7J and 7g will result in corresponding scgnades that act on the R inputs of the short-circuit flip-flops 9 and 9g, transferring them to the opposite state With this, the indicators 10. and 10 turn on, and indicator 13 turns off p.

At the same time, the signals from the outputs of the sensors 7j and 7g act on the second inputs of the logical switches 8 and 8, respectively, which lock and prevent the failure of elements 2 and 3, caused by signals to them with parameters outside the tolerance field, to be fixed. After some time, due to the physical delay in the operation of elements 2 and 3, the outputs of sensors 7 and 7 can cause a signal of their failure. However, due to the blocking of the logical keys 8 and 8z, the failure has been fixed by the trigger 9 and 9

le.e signal from the sensor output

2 and Y is not produced

. Yes through

1 SHI 7

1 as the output signal

element

Sensor 7 is fed to blocking the logical key 8, and the signal from the output of sensor 7 is sent to blocking logical 1 – g 1: keys 8 and 8. At the R input of flip-flop 9, the failure signal of item 1 disappears, but 1 stalk 10 (remains on.

Sequentially all logical keys are blocked, but recorded by RS-flip-flops 9. True failures ensure the burning of the corresponding

5 indicators 10, allows to reliably identify the location of the fault in the feedback loop. In this case, the speed of the device implemented in accordance with the proposed method is determined only by the inertia of the sensors 7, the elements AND 15 of the logic pins 8 and the triggers 9.

The device is reset to its initial state after inputting the output parameters of the functional parameters: the elements of the object 16 of the control to the limits of the tolerance field by supplying the spud Reset to the flip-flops 9,

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Claims (2)

1. A method for diagnosing failures of the feedback loop elements is technically: to: real-time objects, which consists in determining the failed elements by monitoring the output outside the tolerance field of their parameters, characterized in that, in order to increase the reliability and speed without changes and structures of technical objects, failure of individual elements in the feedback loop, they fix at the moment of going beyond the tolerance field of their output parameters and at the same time block the subsequent fixation of failures caused by the response to the true failure of functional elements connected in series with the output of the true failed elements, thus indicating the detected failures of the contour reverse elements connection, and the state of the technical object as a whole is estimated by its output parameter. 2. A device for diagnosing failures of the elements of a feedback loop of technical objects, containing tolerance control sensors. . malfunction indicators and an indicator of good condition, characterized in that, in order to increase reliability and speed without changing the structure of technical objects, logic keys and RS-triggers are entered into it according to the number of functional elements in the feedback loop, and connections in the object are OR elements, the output of each sensor of the tolerance control is connected to the first input of the corresponding logical switch, the second input of which is connected to the output of the sensor of the tolerance control connected to the previous one Functional Editor N. Rogulich Compiled by B. Dmitriev Tehred O. Gortvay Order 3395/48 Circulation 836 Subscription VNIIPI USSR State Committee for inventions and discoveries 113035, Moscow, Zh-35, Raushsk nab., 4/5 Production and printing company, Uzhgorod, st. Project, 4 396884 To a single element of a technical object, the outputs of the tolerance control sensors connected to the elements of the technical object to which the feedback circuits are connected are connected to the second inputs of the logical keys through the OR elements, the outputs of the logical keys are connected to the R inputs of the RS triggers, The S inputs of which are connected 10 and are the device reset input, the outputs of the RS flip-flops are connected to the fault indicators, the output of the tolerance control sensor connected to the output of the technical object, 15 is also connected to the input of the indicator. good condition through the element NOT Proofreader M. Demchik